kelly



(No Model.) 7 I J. T. KELLY.

AIR AND QTEAM TRAP.

Patented Dot. 9, 1883.,

m PEYERS, mbmom wml m a 1;

UNITED STATES PATENT Oriana.

JOHN T. KELLY, OF BROOKLYN, KEV? YORK, ASSIGNOR TO HlMSELF AND GEORGE M.JONES, OF SAME PLACE.

AlR Ann STEAM TRAP.

SPECIFICATION forming part of Letters Patent No. 286,446, dated October9, 1885:,

Application filed June X4, 1883. (No model.) i

To all whom, it may concern.- 7 Be it known that I, JOHN T. KELLY, ofthe city of Brooklyn, in the county of Kings and State of New York, haveinvent-ed a certain new and useful Improvement in Ai r and Steam Traps;and I do hereby declare that the followin g is afull, clear, and exactdescription thereof, reference being had tothe accompanying drawings,and to theletters of reference mark ed :0 thereomwhieh form a part ofthis specification.

My invention has for its object to provide an air and steam tra p verypositive in its op eration, easily adjusted, and not liable to get outof order, to be used more particularly as an air-trap for steam-heatingapparatus; and

it consists in certain improvements in the construction of such atrap,which will be hereinafter fully described, and particularly pointedout in the claims.

2o In the accompanying drawings, corresponding parts in the severalfigures are described by like figures of reference.

Figure 1 is a vertical section of the trap. Fig. 2 is a side elevation,partly in section.

Fig. 3 is a vertical section,illustrating a modification of the trap.

A, Figs. 1 and 2, is a tube, of iron or other suitable metal, connectedto an upper chamber or nozzle-head, B, and also to a lever-box, 0.

0 D is an inner tube, of brass or other suitable metal, which possessesa greater degree of expansion under heat than the outer tube, A. Thetube'D is attached to the upper nozzlehead, so as ,to communicate freelywith the in- 3 5 terior thereof, but its lower end is free for suchvertical motion as may be due to expansion, and is arranged to actorrtheshort arm of the lever E, which is contained within the box 0, whereinit is pivoted on a fulcrum-pin, F. The

0 extremity of the long arm-of this lever is at.- tached to the stem ofthe valve Gby apeculiarshaped joint, consistingof a rocking nut, H,inserted in a transverse bore in the end of the lever-arm E, and throughwhich the threaded 5 stem of the valve G passes. This arrangement allowsthe valve to properly seat itself in the seat a, which is provided inthe bottom of the lever-box C, at the escape-opening, and also allowsthe proper adjustment of the valve by a screw driver or other instrumentinserted through the escape-opening.

I is a waste-pipe connected to the lever-box chamber 0, at theescape-opening, by an ordinary inner coupling.

' J is a serew-plug for closing the opening pro- 5 5 vided in thelever-box (I for the insertion of the lever. The valve is insertedthrough the escape-opening.

The trap shown in Fig. 3 differs in no essential respect from that shownin Figs. 1 and 2, 6o

' except that the nozzle 1), by which it is to be attached to theradiator or other apparatus, is

on the lower chamber or lever-box, 0, instead of on the upper chamber orhead, B. This requires an opening from the upper end of the inner tube,D, or chamber 13, to the outer tube,

A, to provide for free circulation within the inner tube, D. I, however,consider the construction shown in Figs. 1 and 2 preferable,

as the air or water and steam cannot in that reach the outlet withoutpassing through the tube D, which is thus fully exposed to the heatingeffect of the steam.

The operation is as follows: The air or water in the pipes or coils ofthe radiator or other 7 5 apparatus'passes freely from the inlet-nozzleI) to and past the valve G,-and to the wastepipe, s'olong as the tube Dremains cool and does not, expand but as soon as steam enters, the saidtube becomes. expanded by the heat, and, acting on the lever IE, willclose the valve G, thus preventing any escape of steam. The valve, itwill be observed, closes inward, so that it cannot be closed by thepressure of steam in the trap, but must remain open until the tube Dbecomes heated and expanded by the steam.

The arrangement of the fulcrum F for the lever E immediately below theend of the tube D, and the endoi said tube having a bearing at one sideonly on the short arm of the lever, enables me to get a comparativelygreat movement of the valve with a slight expansion of the tube, andstill to preserve the compact arrangement of parts.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination of the tubes A D, having different degrees ofexpansion, the tube D being opened at both ends, so that the steam mayhave free access to its interior, the nozzlehead or chamber B andlover-box Oat the ends 10 the tube D acts, and an outlet-valve carriedby said lever, substantially as described.

3. The combination, with the tubes A D, hav ing different degrees ofexpansion, of the head or chamber B and the lever-box 0, connecting theends of said tubes, the lever E, fulcrumed immediately below the tube D,and having theedge at one side of said tube bearing on its shorter arm,and an outlet-valve connected with the longer arm of the lever,substantially as described.

4C. The combination, with the tubesA and D, having different degrees ofexpansion, of the head or chamber B, the lever-box 0, having the outletI and'a valve-seat therein, the lever E, having the rocking nut H,fitting a cylindrie box in its end, so as to be free to turn therein,and the outwardly-opening valve G,

having its stem screwed into said rocking nut and accessibleforadjustment through said outlet-opening I, substantially as described.

J NO. T. KELLY.

\Vitnesses:

FREDK. HAYNEs, ED. L. MORAN.

